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Firejail vs SELinux: catalog facts
Firejail	SELinux
Free Free and open source.	Free Free and open source.
Linux, Command line	Linux, Command line
Sandboxes existing applications without modifying them Uses kernel namespaces and seccomp-bpf filtering	Mandatory access control enforced by the kernel Complete set of policy compilers and management tools
Linux only Runs as a SUID program, which some users consider a risk in itself	Linux only Writing and debugging policy has a steep learning curve
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.